An antenna assembly generally includes an antenna module mountable to a vehicle body wall. The antenna base module includes a base, a protective cover coupled to the base, at least one antenna element disposed within an interior enclosure collectively defined by the protective cover and the base, and one or more latching members. An outer cosmetic cover has one or more snap clip members engageable with the one or more latching members when the outer cosmetic cover is positioned generally over the protective cover. The snap clip members and latching members are resiliently flexible and configured for forming a resiliently compliant connection therebetween. In a final installed position of the antenna assembly to the vehicle body wall, the lower edge of the outer cosmetic cover conforms against the vehicle body wall substantially without any gap therebetween.